Just to follow up, have you tried using the auto calibration of the IQ channel released recently?
As far as we can discern, this might give you a good deal of reduction in the problematic spurious frequencies. Also by using manual tuning where the daughterboard tuning is at least 12.5 kHz away (for the P25, as I understand that is the bandwidth?) and the DSP handles the rest? Effectively changing the setup to a superhet. Just some thoughts Best Paul -- * - - */* -/* * -/* - * */- * * */*/- */- * */* */- * * -/*/- */* - - *- */- - */- -/* -/* */* - * */* - * - * -/- * - */- - -/- -//
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